Collapse of architect (7)
I believe the answer is:
founder
This clue is a double definition.
'collapse' is the first definition.
(synonyms)
'architect' is the second definition.
(thesaurus)
'of' acts as a link.
(Other definitions for founder that I've seen before include "Beginner" , "One who makes an institution" , "One who establishes an institution" , "(Of ship) fill with water and sink" , "Sink, come to grief" .)